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Chapter 1 Introduction Installation and Operation Manual

1-8 Functional Description IPmux-11 Ver. 2.00

Figure 1-4. IPmux-11 in External Clock Mode

Single Source Clock Network

When a common clock is not available on all the ends of the network, one of the

IPmux-11 devices is configured to work in loopback timing, while the other

IPmux-11device is configured to work in adaptive timing (see

Figure 1-5).

Figure 1-5. IPmux-11 in Adaptive Timing Mode

Frame Format

TDMoIP

The Ethernet frame sent by IPmux-11 is a UDP datagram that transfers E1/T1

payload bytes over IP over Ethernet (UDP payload + UDP header + IP header +

Ethernet header). The UDP payload is equal to TDM bytes per frame

(TDM bytes/frame configuration).

Table 1-2 specifies the structure of the different

headers, special fields, and the payload in the Ethernet packet.

CRC TDM Payload CW

UDP IP ETH

Figure 1-6. TDMoIP Frame Structure

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 147 148

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